Useless irritating Company

So this battle has been going on for a while after phone calls etc this company and their client still dont get the point that I have no interest in talking to either of them as I sorted out this all with their client (a gym im sure you all heard of P. F) and then with them as well. So im sick and tired of their calls to settle an amount with the gym after the gym even admitted that they are wrong. This company is useless and does no admin.